Harold was educated at the London Hospital, qualifying L.R.C.P., M.R.C.S. in April 1907. During his time at the hospital he took an active interest in the Students’ Clubs Union, and was a member of the Rugby, Football, Hockey and Fives Clubs. After leaving the Hospital he served at Plymouth and Portsmouth. He obtained a commission as Lieutenant in the R.A.M.C. on 29th July 1907, being promoted to Captain on 29th January 1911. From 1910 to 1915 Harold served in India, at Jhansi, Kamptee, Rawal Pinde and Peshawar. He joined the Mediterranean Expeditionary Force in 1916, then proceeded to the Western Front. He became the Commanding Officer of the 71st Field Ambulance between July 1916 and September 1917. The Unit's war diary states ""Noordpeene [6km W. of Cassel] 06.09.1917, 11 a.m. Lt.-Col. H. Gibson, whilst reconnoitering the forward area E. of Ypres was wounded and evacuated to No.2 Canadian C.C.S." [Researched and kindly provided by Brian Matthews]. Harold died from sepsis at the Duchess of Westminster’s Hospital in Paris. ‘The 23rd Division (X Corps) was at rest but had received orders to prepare for an attack (Battle of the Menin Road Ridge, 20-25.09.1917). On 18th October 1917 a party of men from his ambulance, under Lt. and Q.M. C. Elliott went down to attend his funeral. [Researched and kindly provided by Brian Matthews]. Harold was the youngest son of Lt-Col G J Gibson, A.M.S. (retired) of Totnes, Devon; and husband of Maude M Gibson of Broadmead Rd South, Babbacombe, Torquay, Devon.